1990 Honda Accord Auto question

1990 HONDA ACCORD
260,000 MILES • 6 CYL • AWD • MANUAL
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RIEHL
  • MEMBER
  • 1 POST
When in neutral or not applying the gas pedal...the RPM's continually go up 10,000 and back down. Do you have any ideal what might fix this problem?
Dec 27, 2008 at 2:57 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
Hi riehl,

This is known as surging and most probably there is a vacumn leakage or a fault in the Electronic Air Control Valve ( EACV ) also known as the Idle Air Control ( IAC )valve.
Dec 29, 2008 at 12:46 AM
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